JPS60166556A - Regulator for height of air spring for railway rolling stock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an air spring height adjustment device for a railway vehicle that supports a car body through an air spring, and is particularly suitable for a railway vehicle having a pendulum device. This invention relates to a vehicle air spring height adjustment device.

[Background of the invention]

A conventional air spring height adjustment device for a railway vehicle will be explained with reference to FIGS. 1 to 4. In the figure, 1 is a vehicle body, 2 is an air spring, and 3 is a device that controls compressed air B supplied from a compressed air source to the air spring 2 via a pipe P, and controls compressed air in the air spring 2 as necessary. This is a height adjustment valve that always maintains the height of the vehicle body at a constant level by discharging air and adjusting the height of the air spring 2. Reference numeral 4 denotes a pillow beam, and the height adjustment valve 3 adjusts the height of the air spring 2 by detecting the relative displacement between the pillow beam 4 and the vehicle body 1 using a link or the like. By the way, in a railway vehicle that does not have a pendulum device, when excessive centrifugal force A is applied while traveling on a curve, as shown in Figure 3 C), the vehicle body] falls to the outside of the curve, and falls on the inside of the curve, that is, on the inner soft side. car body] and pillow beam 4
Since the distance between the soft inner air spring 2' and In the state shown in Figure (B), the structure is such that the vehicle body is prevented from falling outward.

However, railway vehicles equipped with pendulum devices have the following problems. That is, as shown in Fig. 4, when traveling on a curve, a centrifugal force A acts on the car body J, and when the centrifugal force A is small, the friction of the roller of the pendulum device or Although there is no pendulum action due to inertial force, if an even larger centrifugal force A is applied, the car body 1 will tend to fall to the outside of the curve, that is, to the outer track side, as shown in Figure 4. By the function of the height adjustment valve, compressed air is supplied and discharged from the inner soft side air spring 2' and the outer track side air spring 2'', and operates to maintain the bogie parallel to the floor surface of the car body 1. In this state, when the centrifugal force A increases and overcomes the friction or inertia of the rollers of the pendulum device S and a pendulum action is performed as shown in No. 4n-, the centrifugal force acting on the vehicle body 1 due to the pendulum action When the amount of air supplied and discharged from the inner soft air spring 2' and the outer air spring 2' is reduced, the vehicle body 1 moves as shown in FIG. (
As shown by +tl, it will lean toward the soft inner side. Therefore, the pendulum angle increases isometrically by the amount of the air spring displacement described above, causing the vehicle body 1 to rock and resulting in a reduction in riding comfort. In addition, in the state shown in FIG. 4 (FIG. 4), air is supplied to the inner soft side air spring 2' by the height adjustment valve, and air is exhausted from the outer track side air spring, resulting in the state shown in FIG. 4 (F). By the way, the state shown in FIG. 4 is a state in which the pendulum angle due to the pendulum action and the centrifugal force are balanced (excessive centrifugal acceleration α: -0). In addition, the excess centrifugal acceleration α
. acts. In such a state, a mechanical stopper is provided to prevent the pendulum angle of the vehicle body 1 from exceeding a certain angle due to constraints such as the vehicle limit, so the vehicle body 1 will not be able to oscillate as shown in Figure 4 (H). In order to prevent the car body from tilting, air is supplied to the outer track side air spring 2' by the height adjustment valve, and the inner soft side air spring τ is exhausted.In this state When the vehicle passes through a curved track and then travels on a straight track, it will be in the state shown in Figure 4 (a).
Since the internal pressure of the outer track side air spring 2' is high and the internal pressure of the inner soft side air spring 2 is low, the vehicle body 1 tilts toward the inner soft side, and the pendulum device does not return to the normal position due to the tilt of the vehicle body 1. arise. This condition can be controlled to the condition shown in Fig. 4 by adjusting the internal pressure of the air springs 2' and 2 on the inner soft side and outer track side by the action of the quality adjustment valve, but the above-mentioned height The regulating valve has a certain time constant (I), and there is a restriction in the middle of the air spring supply/exhaust piping as a countermeasure in the event of a puncture of the air spring, so there is a problem that the response is slow.
As mentioned above, the vehicle runs with the vehicle body 1 tilted, and the ride comfort deteriorates due to the deviation in tilt of the vehicle body 1 between the pendulum device and the air spring. Furthermore, since the air spring is frequently supplied and exhausted, the amount of air lR'! There was a drawback that ir increased.

[Purpose of the invention]

In view of the points mentioned above, the present invention provides for adjusting the height of an air spring due to the movement of the center of gravity of the vehicle due to the pendulum action of a pendulum device provided on the vehicle and changes in the centrifugal force acting on the vehicle body when the vehicle is traveling on a curve. The purpose of this invention is to improve the ride comfort in a railway vehicle having a pendulum device by suppressing the air spring height adjustment mechanism and preventing an adverse effect on the pendulum action caused by the height adjustment mechanism of the air spring.

[Summary of the invention]

In a railway vehicle having a pendulum device, when traveling on a curve, the center of gravity layer of the vehicle moves due to centrifugal force acting on the vehicle body and inclination due to the pendulum action of the vehicle body. For this reason, the height of the air spring that supports the vehicle body changes, but the air spring is controlled by a height adjuster so that it always remains at a constant height. However, the height control of the air spring cannot cope with the inclination of the vehicle body due to centrifugal force and pendulum action acting on the vehicle body, and the height control has an adverse effect on riding comfort. The present invention suppresses the adjustment of the height iPl of the air spring by controlling the internal pressure of the air spring during pendulum action.

The present invention is characterized in that it prevents an adverse effect due to the height control of the n air springs when traveling on a curve.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 5 and 6. In the figure, the same reference numerals as in the conventional example indicate the same members. 4' is a mf''L pillow which supports the vehicle body J via an air spring 2 at the upper part, and a pendulum device W5 consisting of a suspension and a roller support is provided at the lower part.The pendulum device 5 is arranged on the bogie 10. 6 is a solenoid valve provided in a pipe connecting the height adjustment valve 3 and the air spring 2, and controls the flow 12 of compressed air supplied or discharged by the height adjustment valve 3. In addition, 6a, 6b, 6
(c and 6d indicate vehicles) and a solenoid valve 6a.

6b is installed on the front truck, and solenoid valves 6c and 6d are installed on the rear truck. Reference numeral 7 denotes a controller that outputs a command for controlling the opening and closing of the electromagnetic valve 6, that is, the operation or stopping of the air control in the air spring 2 of the height adjustment valve 3. The control H7 is a point detection device +! that detects the driving point of the vehicle. 77a, a curve information device 7b that predicts the curve position based on the signal from the point detection device lη7a, and a solenoid valve 6 based on the signal from the curve information device $7b and the speed signal from the point detection device i17a. In such a configuration, when the vehicle is running, the curve information device 7b compares the signal from the point detection device 7a with pre-stored curve information and determines the corresponding curve information. When the vehicle approaches a curve, a curve information signal is output to the control command device 70. In the fully equipped control command H7c, the curve information signal from the oil distribution line information device 7b corresponds to the speed signal from the point detection device 7a, and when the vehicle enters the curve at a speed higher than the equilibrium speed, the electromagnetic A control signal is output to the valve 6 to stop supplying and discharging air. By the way, when the vehicle is not traveling on a curve, the solenoid valve 6 does not control the flow of compressed air between the height adjustment valve 3 and the air spring 2.
fttsu will not be suspended. However, () excessive centrifugal acceleration α during pendulum operation. In order to prevent the vehicle body 1 from falling outward when the vehicle is traveling on a curve at a speed that causes a curve, it is desirable that the height adjustment valve 3 and the air spring 2 be communicated with each other at least when traveling on a circular curve. For this reason,
Addition of a list of determination mechanisms to the control command device 7c 1. It is better to Furthermore, for the safety of the control system, it is easily possible to feed back the pendulum displacement to the controller 7.

With such a configuration, for example, supply and discharge of compressed air to and from the air spring 2 is stopped when the pendulum device 5 operates as a pendulum.
The reverse pendulum when entering a curve can be alleviated, and the controllability when controlling the pendulum action is improved, so riding comfort can be improved and compressed air consumption can be reduced.

Note that, in the embodiments described in Section R, a configuration has been described in which the supply and discharge of compressed air to and from the air spring 2 is stopped. The above effect can be achieved.

〔Effect of the invention〕

As explained above, according to the present invention, 1. For example, in 11 railroad cars equipped with a pendulum device, it is possible to prevent adverse effects on the pendulum operation due to changes in the height of the air spring caused by centrifugal force, and to improve ride comfort.

[Brief explanation of drawings]

Figure 1 is a front view of the air spring section in a conventional railway vehicle.
Fig. 2 is an enlarged front view of the air spring and height adjustment valve in Fig. 1, Fig. 3 is a front view of the car body showing a state in which centrifugal force A is applied to a conventional railway vehicle, and Fig. 4 is a front view of the car body with a pendulum device. FIG. 5 is a front view of the vehicle body showing an embodiment of the air spring height adjustment device according to the present invention, and FIG. 6 is the same as that of FIG. FIG. 2 is a circuit diagram showing a control circuit for a solenoid valve in one embodiment.

Claims (1)

[Claims] 1. A bogie, a vehicle body supported by the bogie driver, and a pendulum device disposed between the bogie and the vehicle body to tilt the vehicle body;
An air spring is placed between the bogie and the car body to support the car body with respect to the n bogie, and the internal pressure of the air spring is controlled by detecting the relative displacement between the bogie and the car body to maintain a constant height of the car body. In an air spring height adjustment device for a railway vehicle, which consists of an air spring height adjustment mechanism that maintains the height of the air spring, the system detects the running condition of the vehicle and suppresses changes in height by controlling the internal pressure of the air spring when centrifugal force is applied to the vehicle body. 1. An air spring height adjustment device for a railway vehicle, characterized in that a control means is provided for controlling the internal pressure of the air spring so as to control the internal pressure of the air spring.